Someone please make a phone charger that is powered by walking!
Imagine having a spare battery pack that is charged by the kinetic motion of walking. Or running. Or biking. Honestly it doesn’t even have to be a phone charger, it could just be a general way to charge batteries or something.
Here’s my first, crude iteration:
Put a thick, inflated balloon into the sole of a shoe. The balloon is connected via some air tube.
When someone walks, it compresses the sole of the shoe. Air is forced through the tub because the balloon is squashed.
Put a magnet or a piston into the tub.
Then, when someone walks, you get an up-and-down piston motion.
Bam, make that charge a battery or something.
I’d at least like to see this on the next episode of Shark Tank.